CN102484384A - Electric-power transaction apparatus and method of controlling electric-power transaction apparatus - Google Patents

Abstract

Provided is an electric-power transaction apparatus and a method of controlling the electric-power transaction apparatus, wherein transactions of electric power between a party possessing high-value electric power and having a desire to sell the high-value electric power, and a party possessing low-value electric power and seeking to buy high-value electric power can be conducted with reliability. An electric-power information control unit (15A) conducts an electric-power transaction between a storage battery (3A) and a storage battery (3B), on the basis of a first electric-power information that includes the amount of electric power stored in the storage battery (3A) and electric-power value information pertaining to the value of that amount of electric power, and a second electric-power information that includes the amount of electric power stored in the storage battery (3B) and electric-power value information of that amount of electric power. In this case, electric-power value information about the storage battery (3A) and the storage battery (3B) are compared with respect to a prescribed amount of electric power, and when there is electric-power information wherein electric-power value information about the storage batteries (3A, 3B) are different from each other with respect to the prescribed amount of electric power, the electric-power value information are swapped, and stored into a first electric-power information storage unit (14A), and a second electric-power information storage unit (14B) of a second electric-power transaction apparatus (5).

Description

Power trading device and control method for power trading device

technical field

The present invention relates to a power trading device and a control method of the power trading device that trade power between electric powers of different values. For example, the present invention relates to a power trading device and a control method for the power trading device that trade power between power generated by natural energy such as sunlight or wind power and power generated by fossil fuels such as oil or natural gas.

Background technique

In recent years, attempts have been made to improve the purchasing system of electric power generated by photovoltaic power generation devices in order to accelerate the popularization of photovoltaic power generation devices. The Japanese government has increased the purchase price to twice the previous price since November 2009 (48 yen per kWh for general residential buildings).

On the other hand, electricity generated from fossil fuels such as oil or coal is not subject to purchase. In addition, when a photovoltaic power generation device is installed on agricultural land, although the agricultural land has good sunlight conditions and a relatively wide area to some extent, it is suitable for power generation, but the electricity generated there is not subject to purchase. Then, although it appears to be the same electric power, the operation of selling the electric power differs depending on the power generation method and the like, so that high-value electric power and low-value electric power exist.

As prior art related to power exchange, for example, technologies disclosed in Patent Document 1 and Patent Document 2 are known.

Patent Document 1 discloses a power information processing method in which an installer who owns a power generating mechanism and a manager who manages power information are connected via a network, and the power generation of the power generating mechanism is measured on the installer side. and the electricity consumed by the installer himself, and notify the manager of each power history information. On the manager side, calculate the legitimate sales that the installer can legally sell based on the power history information sent by the installer. power generation, and calculate the remuneration in line with the legitimate sale of power generation.

Patent Document 2 discloses a power load balancing method that releases power stored in a battery during a peak power demand period at a business site (power demanders receiving power from a power company) to balance the power load. During the off-peak period of power demand or by using the nighttime power of the vehicle, the batteries of a large number of vehicles are charged, and the power accumulated in the charged battery of the vehicle is released during the peak period of power demand at the enterprise site.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2005-185016

Patent Document 2: Japanese Unexamined Patent Publication No. 2007-282383

Summary of the invention

The problem to be solved by the present invention

Where power generators (for example, people with solar power generation devices in ordinary households) have both high-value electricity (electricity generated by solar power generation devices) and low-value electricity (electricity generated by fossil fuels such as oil or coal) When using electricity obtained), it can be considered to prioritize consumption of low-value electricity and sell high-value electricity to others to fully utilize its value. However, when the low-value electricity is used up, the high-value electricity has to be used.

On the other hand, electricity that is traded like a green electricity certificate is renewable energy, and those who find value in it hope to popularize solar power generation devices in homes and effectively use the generated electricity, but it has not yet been realized.

Contents of the invention

The present invention is made in view of this situation, and its purpose is to provide a power trading device and a control method for the power trading device that can be used between people who have high-value power and want to sell it, and people who have low-value power and need high-value power. Power transactions with high reliability.

means of solving problems

The power trading device of the present invention includes: a first power information obtaining module that obtains stored information from a first power information storage module that stores first power information, the first power information including the amount of electricity stored in the first storage battery and the power value information, the power value information is information related to the value of the electricity; the second power information obtaining module obtains storage information from a second power information storage module storing the second power information, and the second power information includes The amount of electricity stored in the second storage battery and power value information of the amount of electricity; and a power information control module that performs a process between the first storage battery and the second storage battery based on the first power information and the second power information. Electricity trading; the electric power information control module compares the electric power value information for a specific electric quantity between the electric quantity of the first storage battery and the electric quantity of the second storage battery. When using power information with different power value information, the power value information is exchanged and stored in the first power information storage module and the second power information storage module.

According to the above structure, the power value information related to the value of the electric power stored in the first storage battery and the second storage battery is compared, and the power value information is exchanged when the two storage batteries have different power value information for a specific amount of electricity. Electricity trading can be performed with high reliability between a person who has high-value electricity and wishes to sell it, and a person who has low-value electricity and wishes to acquire high-value electricity.

In the above structure, the electric power value information includes a power generation method or electric power price of the electric power stored in the storage battery.

According to the above configuration, by having power value information including the power generation method and power price stored in the storage battery, high-value power and low-value power can be accurately grasped, and power trading can be performed with high reliability.

In the above structure, the power information control module divides the first power information into a plurality of power information so as to compare the Electricity value information.

According to the above configuration, by dividing the first electric power information into a plurality of electric power information, it is easy to compare electric power value information for specific electric power, and it is possible to perform electric power trading with high reliability.

In the above configuration, a power storage state grasping module is provided to grasp the power storage state of the first storage battery, and when it is known by the power storage state grasping module that the discharge rate of the first storage battery is equal to or lower than a predetermined value, the The power information control module compares the power value information under the specific electric quantity.

According to the above configuration, by monitoring the discharge rate, power trading can be performed with high reliability without performing power trading while the first storage battery is being discharged (that is, while power is being used).

In the above structure, before the power information control module compares the power value information at the specific power level, the power storage state grasping module measures the power stored in the first storage battery again, and the The first power information is updated and stored in the first power information storage module.

According to the above configuration, the electric power stored in the first storage battery is remeasured and the first electric power information is updated before comparing the electric power value information at the specific electric power, so that electric power trading can be performed with high reliability.

In the above configuration, a storage battery characteristic correction module is provided, the storage battery characteristic correction module stores the storage characteristics of the first storage battery, and the electric power information control module uses The storage battery characteristic correction module corrects the electric power stored in the first storage battery, and updates the first electric power information to perform the electric power transaction.

According to the above structure, before comparing the electric power value information at the specific electric power, the electric power stored in the first storage battery is corrected and the first electric power information is updated, so electric power trading can be performed with high reliability.

In the above configuration, the first electric power information includes information on a measured temperature of the first storage battery when measuring an electric quantity stored in the first storage battery, and the storage battery characteristic correction module includes a temperature characteristic correction module, The temperature characteristic correction module stores the characteristics of the storage capacity and temperature of the first storage battery, and the power information control module uses the temperature characteristic correction module and according to the The measured temperature and the temperature at the time of the power transaction are used to correct the amount of electricity stored in the first storage battery, and to update the first power information to perform the power transaction.

According to the above configuration, before comparing the power value information at a specific power level, the power stored in the first storage battery is corrected and the first power information is updated based on the measured temperature obtained by measuring the temperature of the first storage battery and the temperature at the time of power transaction. Power transactions can be performed with high reliability.

In the above configuration, the first electric power information includes information on the measurement time when the electric quantity stored in the first storage battery is measured, and the storage battery characteristic correction module includes a self-discharge characteristic correction module, the self-discharge characteristic The correction module stores the storage capacity of the first storage battery and the characteristics of the elapsed time, and the power information control module uses the self-discharge characteristic correction module according to the self-discharging characteristic before comparing the power value information under the specific power level. The electric power transaction is performed by correcting the electric power stored in the first storage battery according to the measurement time and the time of the electric power transaction, and updating the first electric power information.

According to the above structure, before comparing the electric power value information at the specific electric power, the electric power stored in the first storage battery is corrected and the first electric power information is updated based on the measurement time when the electric power stored in the first storage battery is measured and the time when electric power is traded. , so power trading can be performed with high reliability.

The control method of the power trading device of the present invention has the following steps: the first power information obtaining step is to obtain the storage information from the first power information storage module that stores the first power information, and the first power information includes the first power information in the first battery The accumulated electricity and electricity value information, the electricity value information is information related to the value of the electricity; the second electricity information obtaining step is to obtain the storage information from the second electricity information storage module storing the second electricity information, the The second electric power information includes electric power stored in the second storage battery and electric power value information of the electric power; and a power trading step of trading between the first storage battery and the second electric power information based on the first electric power information and the second electric power information. power trading between storage batteries; in the power trading step, comparing the power value information for a specific quantity of electricity between the electric quantity of the first storage battery and the electric quantity of the second storage battery, when the two storage batteries have In the case of electric power information having different electric power value information for the specific amount of electricity, the electric power value information is exchanged and stored in the first electric power information storage module and the second electric power information storage module.

According to the above method, the electric power value information related to the value of electric power respectively stored in the first storage battery and the second storage battery is compared, and the electric power value information is exchanged when the two storage batteries have electric power information with different electric power value information for a specific electric quantity, It is therefore possible to conduct electricity trading with high reliability between a person who has high-value electric power and wishes to sell it, and a person who has low-value electric power and wishes to obtain high-value electric power.

The program of the present invention causes a computer to execute the control method of the power trading device.

According to the above procedure, the electric power value information related to the value of electric power respectively stored in the first storage battery and the second storage battery is compared, and the electric power value information is exchanged when the two storage batteries have different electric power value information for a specific electric quantity, It is therefore possible to conduct electricity trading with high reliability between a person who has high-value electric power and wishes to sell it, and a person who has low-value electric power and wishes to obtain high-value electric power.

Invention effect

According to the present invention, power trading can be performed with high reliability between a person who has high-value electric power and wishes to sell it, and a person who has low-value electric power and needs high-value electric power.

Description of drawings

FIG. 1 is a block diagram showing a schematic configuration of a power trading device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing an overview of electric power buying and selling by an electric vehicle using the electric power trading apparatus of FIG. 1 .

3( a ) and FIG. 3( b ) are schematic diagrams showing the flow of power trading using the power trading device of FIG. 1 .

4 is a diagram showing an example of power information stored in a first power information storage unit of the first power trading device of FIG. 1 .

5 is a diagram showing an example of power information stored in a second power information storage unit of the second power trading device of FIG. 1 .

Fig. 6 is a flowchart for explaining the operation of the first and second power trading devices in Fig. 1 .

Fig. 7 is a block diagram showing a schematic configuration of a power trading device according to a second embodiment of the present invention.

8 is a diagram showing an example of power information stored in a first power information storage unit of the first power trading device of FIG. 7 .

9 is a diagram showing an example of power information stored in a second power information storage unit of the second power trading device of FIG. 7 .

Fig. 10 is a flowchart for explaining the operation of the first and second power trading devices in Fig. 7 .

Fig. 11 is a block diagram showing a schematic configuration of a power trading device according to a third embodiment of the present invention.

FIG. 12 is a schematic diagram showing an overview of power trading through an information communication network using the power trading device of FIG. 11 .

Fig. 13 is a flowchart for explaining the operations of the first and second power trading devices of Fig. 11 .

Fig. 14 is a block diagram showing a schematic configuration of a power trading device according to a fourth embodiment of the present invention.

Fig. 15 is a flowchart for explaining the operation of the first and second power trading devices of Fig. 14 .

Detailed ways

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(first embodiment)

FIG. 1 is a block diagram showing a schematic configuration of a power trading device according to a first embodiment of the present invention. The first power trading device 1 and the second power trading device 5 shown in FIG. 1 have the same structure and function. FIG. 2 is a schematic diagram showing an outline of power trading by an electric vehicle using the power trading device according to the present embodiment. In FIG. 2, the first power trading device 1 and the second power trading device 5 shown in FIG. .

As shown in FIG. 2, in the electric vehicle 100, the storage battery 3B (see FIG. )Charge. When shopping using the electric vehicle 100, the electric vehicle 100 is connected to the first power trading device 1 provided in a commercial facility, thereby selling high-value electric power. In addition, low-value electric power is purchased from the first electric power trading device 1 if necessary. Electric vehicle 100 stores at least electric power necessary for traveling from a commercial facility to a charging station and back in storage battery 3B.

In this way, low-value electric power and high-value electric power are mixed in storage battery 3B of electric vehicle 100 , and high-value electric power is sold to commercial facilities. However, in the present invention, electricity is bought and sold by exchanging values and data instead of charging and discharging. That is, since the high-value electric power and the low-value electric power are the same electric power, it is not necessary to exchange by charging and discharging at the time of buying and selling, and it is only necessary to rewrite the value and data of buying and selling. In addition, if charging and discharging are performed at the time of buying and selling, the corresponding processing will take time, and even if there is only a small amount, power will be lost due to the resistance of the line or contact resistance, or the storage battery will deteriorate due to the increase in the number of charging and discharging, so it is not preferable. .

Fig. 3 is a diagram schematically showing the flow of power trading using the first power trading device 1 and the second power trading device 5 shown in Fig. The state of charge of (first storage battery) 3A and storage battery 3B, FIG. 3( b ) shows the charging states of storage battery 3A and storage battery 3B after electric power is sold. In the storage battery 3A on the side of the first power trading device 1 , for example, 50 kWh of electric power charged by a self-contained power generating device is stored. The value of the electric power charged by the self-contained power generator is, for example, 20 yen/kWh (low-value electric power). The first electric power information is stored in the first electric power information storage unit 14A, and the first electric power information includes electric power value information, which is information related to the value of the electric power, of the electric power of the storage battery 3A.

On the other hand, in the storage battery 3B on the side of the second power trading device 5 , for example, 5 kWh of electric power charged by nighttime power and 10 kWh of electric power charged by solar power generation are stored. The value of electric power charged by photovoltaic power generation is, for example, 40 yen/kWh (high value electric power). The second electric power information is stored in the second electric power information storage unit 14B, and the second electric power information includes the electric power of 5 kWh, the electric power of 10 kWh, and information on the value of the electric power, that is, electric power value information.

When power trading is performed between the first power trading device 1 and the second power trading device 5, since the 10 kWh power stored in the storage battery 3B on the side of the second power trading device 5 is high-value power, it is sold. Go out to the side of the first power trading device 1 . In the situation shown in FIG. 3( a ) and FIG. 3( b ), the second power trading device 5 sells all 10 kWh of power. On the other hand, since the 50 kWh power stored in the storage battery 3A on the first power trading device 1 side is low-value power, it is sold to the second power trading device 5 side. At this time, 10 kWh of electric power is sold in the second electric power trading device 5 .

As described above, electricity is bought and sold by exchanging numerical values and data only not by charge and discharge, but in this embodiment, electricity is bought and sold using "electricity tags". For example, in the case of Fig. 3(a) and Fig. 3(b), "power information (1)", "power information (1A)", "power information (2)", "power information (3)" and Each of "power information (1B)" is a power label. After the power trading, as shown in FIG. 3( b ), the storage state of the storage battery 3A on the side of the first power trading device 1 is 40 kWh charged by the self-contained power generation device and 10 kWh purchased from the electric vehicle 100. The storage state of the storage battery 3B on the side of the second power trading device 5 is 5 kWh charged with nighttime power and 10 kWh purchased from the side of the first power trading device 1 .

Next, the first power trading device 1 and the second power trading device 5 will be described in detail. In FIG. 1 , a first power trading device 1 includes a power storage state grasping unit 11A, a temperature detection unit 12A, a timer unit 13A, a first power information storage unit 14A, a power information control unit 15A, a communication unit 22A, and a settlement unit 23A. A storage battery 3A is connected to the first power trading device 1 , and the storage battery 3A stores electric power generated by the power generation device 2 . Furthermore, an electricity selling device 4 that actually sells electric power is connected to the storage battery 3A.

In the first power trading device 1 , the power storage state grasping unit 11A grasps the power storage state such as the charging and discharging speed of the storage battery 3A, and notifies the electric power information control unit 15A of the result. Temperature detection unit 12A detects the temperature around battery 3A when power storage state grasping unit 11A grasps the power storage state of battery 3A, and notifies power information control unit 15A of the result. The timekeeping unit 13A notifies the power information control unit 15A of time information when the temperature detection unit 12A detects the ambient temperature of the storage battery 3A.

The first power information storage unit 14A stores power information related to the storage battery 3A, that is, first power information. As will be described in detail later, the power information shown in FIG. 4 is stored. The power information control unit 15A includes a first power information obtaining module and a second power information obtaining module, and is based on the first power information stored in the first power information storage unit 14A obtained by the first power information obtaining module and obtained by the second power information obtaining module. The power information obtaining module obtains the second power information stored in the second power information storage unit 14B from the second power trading device 5 through the communication unit 22A, the storage battery 3A on the side of the first power trading device 1 and the second power trading Electric power trading is performed between the storage batteries 3B on the device 5 side. Specifically, the electric power value information for a specific electric quantity is compared between the electric quantity of the storage battery 3A and the electric quantity of the secondary battery 3B, and when two electric storage batteries 3A and 3B have electric power information different in electric power value information for a specific electric quantity, these are compared. The power value information is replaced and stored in the first power information storage unit 14A and the second power information storage unit 14B of the second power trading device 5 . The above-mentioned power value information is information including a power generation method or power price of the electric power stored in the storage batteries 3A and 3B. Here, as the specific electric power amount as the electric power transaction amount, the electric power amount which is smaller when comparing electric power information with different electric power value information is taken as the maximum value.

The electric power information control unit 15A is composed of, for example, a microprocessor, and divides the first electric power information stored in the first electric power information storage unit 14A into a plurality of electric power information so as to distinguish between the electric quantity of the storage battery 3A and the electric quantity of the storage battery 3B in the electric power transaction processing. Compare the power value information for a specific amount of electricity at any time. Furthermore, the electric power information control unit 15A compares the electric power value information of the specific electric power when the electric power information control unit 11A learns that the discharge rate of the storage battery 3A is equal to or lower than a predetermined value. Here, the reason for confirming that the discharge rate of the storage battery 3A is below a predetermined value is that since the electric power gradually decreases during the discharge of the storage battery 3A (during the use of electric power), the power transaction is not performed at this time, and the power transaction can be ensured. high reliability.

That is, since the power stored in the storage battery 3A gradually decreases during discharge, power trading is not performed when the discharge rate is high, so that the first power trading device 1 does not perform power trading of power greater than the stored power. If the discharge speed is sufficiently slower than the power trading speed, power trading can be performed. In addition, since the electric power stored in the storage battery 3A gradually increases during charging, the first power trading device 1 does not perform power trading with electric power larger than the stored electric power as described above, but it is also possible to make the storage battery 3A Or the power trading of the first power trading device 1 is not performed at the time of discharging.

In addition, the electric power information control unit 15A remeasures the electric power stored in the storage battery 3A by the power storage state grasping unit 11A before comparing the electric power value information at a specific electric power level, and updates the first electric power information stored in the first electric power information storage unit 14A. and stored in the first power information storage unit 14A. By re-measuring the electric power stored in the storage battery 3A and updating the first electric power information before comparing the electric power value information at a specific electric power, it is possible to perform power trading with high reliability in consideration of self-discharging of the storage battery 3A.

Returning to FIG. 1 , the communication unit 22A transmits the first power information stored in the first power information storage unit 14A to the second power trading device 5 , and obtains the second power information related to the storage battery 3B of the electric vehicle 100 from the second power trading device 5 . 2. Power information. The settlement unit 23A transmits the fee of the electric power exchanged with the second power trading device 5 to the settlement system 6 to settle the fee.

Like the first power trading device 1 described above, the second power trading device 5 includes a power storage state grasping unit 11B, a temperature detection unit 12B, a timer unit 13B, a second power information storage unit 14B, a power information control unit 15B, and a communication unit. 22B and settlement unit 23B. The power storage state grasping unit 11B grasps the power storage state such as the discharge rate of the battery (second battery) 3B of the electric vehicle 100, and notifies the result to the electric power information control unit 15B. Temperature detection unit 12B detects the temperature around battery 3B when power storage state grasping unit 11B grasps the power storage state of battery 3B, and notifies the result to electric power information control unit 15B. The timekeeping unit 13B notifies the power information control unit 15B of time information when the temperature detection unit 12B detects the ambient temperature of the storage battery 3B.

The second power information storage unit 14B stores power information related to the storage battery 3B, that is, second power information. As will be described in detail later, the power information shown in FIG. 5 is stored. The power information control unit 15B transmits power information to and from the first power trading device 1 through the communication unit 22B, and uses these information and various information obtained from the power storage state grasping unit 11B, the temperature detection unit 12B, and the timer unit 13B, Power trading is performed between the storage battery 3B and the storage battery 3A.

The power information control unit 15B includes a first power information obtaining module and a second power information obtaining module, and is based on the second power information stored in the second power information storage unit 14B obtained by the second power information obtaining module and obtained by the first power information obtaining module. The power information obtaining module obtains the first power information stored in the first power information storage unit 14A from the first power trading device 1 through the communication unit 22B, the storage battery 3B on the side of the second power trading device 5 and the first power trading Electric power trading is performed between the storage batteries 3A on the device 1 side. Specifically, the electric power value information for a specific electric quantity is compared between the electric quantity of the storage battery 3B and the electric quantity of the secondary battery 3A, and when two electric storage batteries 3B and 3A have electric power information with different electric power value information for the specific electric quantity, the electric power value information is compared. The value information is replaced and stored in the second power information storage unit 14B and the first power information storage unit 14A of the first power trading device 1 . The above-mentioned power value information is information including a power generation method or power price of the electric power stored in the storage batteries 3B and 3A.

The power information control unit 15B divides the second power information stored in the second power information storage unit 14B into a plurality of power information in order to compare the power for a specific power amount between the power amount of the storage battery 3B and the power amount of the storage battery 3A in the power trading process. value information. Furthermore, the electric power information control unit 15B compares the electric power value information of the specific electric power when the electric power information control unit 11B learns that the discharge rate of the storage battery 3B is equal to or lower than a predetermined value. In addition, the electric power information control unit 15B remeasures the electric power stored in the storage battery 3B by the power storage state grasping unit 11B before comparing the electric power value information at a specific electric power, and updates the second electric power information stored in the second electric power information storage unit 14B. And stored in the second power information storage unit 14B.

Returning to FIG. 1 , the communication unit 22B transmits the second power information stored in the second power information storage unit 14B to the first power trading device 1 and obtains the first power information related to the storage battery 3A from the first power trading device 1 . The settlement unit 23B transmits the fee of the electric power exchanged with the first power trading device 1 to the settlement system 6 to settle the fee.

FIG. 4 is a diagram showing an example of first electric power information stored in first electric power information storage unit 14A of first electric power trading device 1 . The first electric power information includes "event number", "electric power label", "electric quantity (unit price of electric power)", "event content", "battery temperature", "event occurrence time", "event target" and "current information (current status, power usage and power trading)". For example, in the case of event number A1, the "electric power label" is electric power information (1), the "electric power (unit price of electric power)" is 48 kWh (20 yen/kWh), the "event content" is charging, and the "battery temperature" is 5 degrees, "event occurrence time" is 2009/12/0107:00:00, "event target" is generator 2#2222222, "current state of current information" is "has state change → event A2".

In FIG. 4 , events caused by the first electric power information are given event numbers and displayed including past histories, but only the latest events may be displayed. For example, only A3 and A6 are displayed as the latest events in FIG. 4 .

In the "current information", "power usage" is a setting regarding whether to discharge the power of the storage battery 3A for use. For example, while the power trading device 1 is trading the power of the storage battery 3A, "use of power" is set to "prohibited" so that the power of the storage battery 3A is not used. In addition, “power trading” is a setting regarding whether or not the electric power of the storage battery 3A can be traded by the first power trading device 1 . As described above, when the discharge rate is equal to or higher than the predetermined value or during power usage (actual use), the power trading is set to "prohibited" and the power trading is not permitted. In addition, obtained high-value electric power may be set as "prohibited" so that electric power usage and electric power trading are not allowed, thereby maintaining obtained high-value electric power.

The "electric power" is a value measured by the power storage state grasping unit 11A, and the "event content" is given to an event by the power information control unit 15A. The "battery temperature" is a value measured by the temperature detection unit 12A, and the "event occurrence time" is a value measured by the timekeeping unit 13A. The "event target" is the value of the authentication ID obtained by the communication unit 22A. "Event information" is managed by the power information control unit 15A.

In the example shown in FIG. 4, power information (1) is divided into (1A) and (1B) for exchange with power information (3). That is, the power information control unit 15A divides the first power information into a plurality of power information in order to compare the power value information for a specific power amount between the power amount of the storage battery 3A and the power amount of the storage battery 3B. For example, as shown in FIG. 4 , first, the electric power stored in the storage battery 3A is measured again in event A2 before division.

For example, in event A1, there is electric power of 48 kWh charged from the power generator 2 at 7 am on December 1, 2009 at a battery temperature of 5 degrees. When it was measured again, in event A2, it changed to 50 kWh at 10:55:30 am on December 10, 2009 at a battery temperature of 18 degrees. Thus, the amount of power drawn from the battery varies due to differences in battery temperature or the effects of battery self-discharge.

Next, the remeasured electric power is divided. In events A3 to A4, the 50 kWh power information (1) is divided into power information (1A) and power information (1B), and the same power information (3) as the power information (3) is created with 10 kWh power information (1B).

In addition, in events A5 to A6, power trading is performed using the electric power information (1B) stored in the storage battery 3A and the electric power information (3) stored in the storage battery 3B. Since the power information (1B) and power information (3) of event A5 have traded power, the information of "power transaction" in the "current information" of event A5 is "completed", indicating that the power transaction is completed.

In addition, since the power information (3) of event A6 is high-value power (40 yen/kWh) obtained by exchanging with power information (1B), "power usage" and "power usage" in "current information" of event A6 and "Electric power trading" is set to "prohibited", and the state where the use of electric power and electric power trading are not allowed remains.

FIG. 5 is a diagram showing an example of second power information stored in the second power information storage unit 14B of the second power trading device 5 . The second electric power information includes "event number", "electric power label", "amount of electricity (unit price of electric power)", "Event content", "battery temperature", "event occurrence time", "event target" and "current information (current status, power usage and power transaction)". In "Current Status" of "Current Information", in the case where there is a plurality of allowances for power usage, the usage priority thereof is determined by the power information control unit 15B. Here, in the events B4 and B7, it is set that the electric power information (1B) having a lower electric power unit price is used before the electric power information (2).

The power information control unit 15B divides the second power information into a plurality of power information in order to compare the power value information for a specific power amount between the power amount of the storage battery 3B and the power amount of the storage battery 3A. First, before dividing, the electric power stored in the storage battery 3B is measured again in event B3.

The power stored in the battery 3B includes the 12kWh power charged from the solar power generation device at 15:30 on November 8, 2009 in the event B1 at a battery temperature of 22 degrees, and the 1 point, 6kWh of electricity charged from the power company at a battery temperature of 13 degrees. The total power is 18 kWh, but when it is measured again just before power trading with the first power trading device 1, in event B3 at 10:57:30 am on December 10, 2009, at a battery temperature of 18 degrees The change is 15kWh. Thus, the amount of power drawn from the battery varies due to differences in battery temperature or the effects of battery self-discharge.

Next, the remeasured electric power of 15 kWh is divided into electric power generated by the photovoltaic power generation device and electric power charged from the electric power company, and returned. In events B1 and B2, since the ratio of the power generated by the photovoltaic power generation device to the power charged from the power company is 12kWh:6kWh=2:1, the 15kWh of event B3 is divided in this ratio. As a result, 5 kWh of electric power charged from the power company in event B4 and 10 kWh of electric power generated by the photovoltaic power generation device in event B5 are stored in storage battery 3B. When the remeasurement is performed in this way and the electric power stored in the storage battery increases or decreases, processing is performed so that the increase or decrease is distributed in the same ratio as the ratio of each stored power before the remeasurement.

Furthermore, in events B6 and B7, power trading is performed based on the power information (3) stored in the storage battery 3B and the power information (1B) stored in the storage battery 3A. Since the power information (3) of event B6 and the power information (1B) have traded power, the information on "power trade" in "current information" of event B6 is "completed", thereby indicating that the power trade is completed.

In addition, since the power information (1B) of event B7 is low-value power (20 yen/kWh) obtained by exchanging with power information (3), the information about "power usage" in "current information" of event B7 and the information of "power transaction" are set to "permit", thereby maintaining a state in which power usage and power transaction can be realized.

As described above, as shown in FIGS. 4 and 5 , the history of power transactions is stored in the first power information storage unit 14A and the second power information storage unit 14B, respectively. The electric power transaction history is retained in both the first electric power transaction device 1 and the second electric power transaction device 5 , and a follow-up investigation can be performed by referring to both in the future. It is possible to prevent power holders from arbitrarily editing power information, thereby improving the reliability of power transactions.

In addition, the processing when re-measurement is performed and the power stored in the storage battery increases or decreases is not limited to allocating the increase or decrease in the same ratio as the ratio of each stored power before the re-measurement. For example, only increasing or decreasing low value electricity.

Next, the operation of the power trading device according to the first embodiment of the present invention will be described with reference to the flowchart shown in FIG. 6 . In addition, in the description of each step, an element (for example, the electric power information control unit 15A) that executes the step is described together.

By connecting the first power trading device 1 and the second power trading device 5 , the communication units 22A and 22B of the first power trading device 1 and the second power trading device 5 perform mutual authentication. That is, mutual authentication IDs are exchanged at the time of initial connection for authentication (step 1).

After the first power trading device 1 and the second power trading device 5 are connected to each other and authenticated, the power storage state comprehension units 11A and 11B of the first power trading device 1 and the second power trading device 5 measure the power of the storage batteries 3A and 3B. It is confirmed that the discharge rate is equal to or less than a predetermined value (step 2). That is, since the electric power of the storage batteries 3A and 3B gradually decreases during discharge (during power use), the discharge speeds of the storage batteries 3A and 3B are measured so as not to perform power trading at that time.

After confirming that the discharge rates of the storage batteries 3A and 3B are below a predetermined value, the power storage state grasping units 11A and 11B of the first power trading device 1 and the second power trading device 5 measure the electric power stored in the storage batteries 3A and 3B again. , the measurement results are stored in power information storage units 14A and 14B by power information control units 15A and 15B (step 3).

After storing the measurement results of the electric power accumulated in the storage batteries 3A and 3B in the power information storage units 14A and 14B, the power information control unit 15A of the first power trading device 1 reads the data from the power information storage unit of the second power trading device 5 14B reads the second power information related to the storage battery 3B of the electric vehicle 100 on the side of the second power trading device 5 (step 4). It is possible to read only the information of the current stored electric power, and it is not necessary to read the records of past electric power transactions.

After reading the second electric power information related to the storage battery 3B of the electric vehicle 100 , the electric power information control unit 15A compares the high-value electric power accumulated in the storage battery 3B on the second power trading device 5 side with the first power trading device 1 side. The amount of low-value electric power accumulated in storage battery 3A is compared to determine the amount of electric power transaction (here, in the electric power information permitting electric power transaction), and the traded electric power is set as "prohibited use". Here, if necessary, the first electric power information is divided in the same manner as the transaction electric amount, and stored in the electric power information storage unit 14A (step 5). Here, the trading volume of electric power takes the smaller amount of electric power when comparing high-value electric power and low-value electric power as the maximum value.

Then, the power information control units 15A and 15B exchange power information of the power respectively traded by the first and second power trading apparatuses 1 and 5, and store the exchanged power information in each other's power information storage units 14A and 14B (step 6). Next, the power information control units 15A and 15B respectively perform permission setting of power usage and power transaction with respect to the newly stored power information (step 7).

Then, the charges for the electric power that the respective power information control units 15A and 15B have exchanged with the other are sent from the settlement units 23A and 23B to the settlement system 6, respectively, for settlement (step 8). After the power fee settlement, the respective communication units 22A and 22B of the first and second power trading apparatuses 1 and 5 disconnect each other from the other (step 9).

As described above, the power trading device 1 according to this embodiment includes the first power information storage unit 14A for storing the first power information including the amount of electricity stored in the storage battery 3A and the value of the electricity. The information is the power value information; the communication unit 22A receives the second power information from the second power trading device 5 that stores the second power information, and the second power information includes the power stored in the storage battery 3B of the electric vehicle 100 and the power value and the power information control unit 15A executes power trading between the storage battery 3A and the storage battery 3B based on the first power information and the second power information. The electric power information control unit 15A compares the electric power value information for a specific electric quantity between the electric quantity of the storage battery 3A and the electric quantity of the secondary battery 3B, and compares the electric power value information when the two storage batteries 3A and 3B have electric power information different for the specific electric quantity. Value information is exchanged and stored in the first electric power information storage unit 14A and the second electric power information storage unit 14B of the second electric power trading device 5, therefore, it is possible to share high-value electric power between people who hold high-value electric power and wish to sell it, and those who hold low-value electric power. And conduct electricity transactions with high reliability between people who need high-value electricity.

Furthermore, according to the power trading device 1 of the present embodiment, since the first electric power information is divided into a plurality of electric power information so as to compare the electric power value information for a specific electric amount between the electric power of the storage battery 3A and the electric power of the storage battery 3B, it is easy to identify a specific electric power. Electricity value information of electricity quantity comparison enables electricity trading with high reliability.

In addition, according to the power trading device 1 of the present embodiment, since the discharge rate of the storage battery 3A is confirmed, it is possible to prevent the power trading from being performed during the discharge of the storage battery 3A (that is, when using electric power), and to perform it with high reliability. electricity trading.

Furthermore, according to the power trading device 1 of the present embodiment, since the electric power stored in the storage battery 3A is remeasured and the first electric power information is updated before comparing the electric power value information at a specific electric power, electric power trading can be performed with high reliability.

In addition, since the power trading device 5 has the same function as the power trading device 1 , it is of course possible to obtain the same effect.

Therefore, in the above steps 4 and 5, the power information control unit 15A of the first power trading device 1 reads the second power information related to the storage battery 3B from the power information storage unit 14B of the second power trading device 5 to determine the power trading On the contrary, the power transaction amount can also be determined by the power information control unit 15B of the second power trading device 5 reading the first power information related to the storage battery 3A from the power information storage unit 14A of the first power trading device 1 .

When a plurality of power trading devices are connected, which power trading device determines the power transaction amount is determined, for example, by comparing the electric power stored in storage batteries 3A and 3B in step 4 and determining the power trading device with a large storage capacity.

In addition, the power trading device 1 and the power trading device 5 may of course be constituted by dedicated circuits, but it is of course also possible to program the control method of the power trading device using a computer and execute the program on the computer.

In addition, in the first embodiment, the above-mentioned temperature detection units 12A and 12B are not essential structures in the present invention. In this case, "battery temperature" is not recorded in the electric power information in FIGS. 4 and 5 . In addition, in the first embodiment, the above-mentioned timer units 13A and 13B are not essential structures. In this case, "event occurrence time" is not recorded in the electric power information in FIGS. 4 and 5 .

(second embodiment)

Fig. 7 is a block diagram showing a schematic configuration of a power trading device according to a second embodiment of the present invention. In addition, in FIG. 7, the same code|symbol is attached|subjected to the part common to FIG. 1 mentioned above, and description is abbreviate|omitted.

The first power trading device 51 of the present embodiment is connected to a storage battery 3A, and the storage battery 3A stores electric power generated by the power generation device 2 . Moreover, the storage battery 3A is connected to the electricity selling device 4 that actually sells electric power.

The first and second power trading devices 51 and 55 of the present embodiment include storage battery characteristic correction units 16A and 16B, respectively. The storage battery characteristic correction unit 16A has a temperature characteristic correction unit 17A, a self-discharge correction unit 18A, and a charge and discharge count management unit 19A. Likewise, storage battery characteristic correcting unit 16B has temperature characteristic correcting unit 17B, self-discharge correcting unit 18B, and charge and discharge count management unit 19B.

In the present invention, the value and data are replaced instead of electric power trading by charging and discharging, so it is necessary to accurately grasp the physical characteristics of the storage battery to ensure high reliability in electric power trading. That is, since there are individual differences since not all storage batteries have the same physical properties, and also considering deterioration over time, it is necessary to correctly grasp the physical properties of the storage batteries. By grasping the physical characteristics of storage batteries, it is possible to secure higher reliability in power trading.

In addition, in this embodiment, the influence of the temperature characteristic of a storage battery and self-discharge is calculated|required by calculation. Therefore, it is possible to set a standard model of temperature and self-discharge and perform power trading. For example, it may be stipulated that the stored electric power is traded in a state where the battery temperature is 25 degrees and the self-discharge is 1% or less.

The storage battery characteristic correcting unit 16A stores the storage characteristic of the storage battery 3A, uses the storage characteristic to correct the quantity of electricity stored in the storage battery 3A, and updates the first power information before the power information control unit 15A compares the power value information at a specific quantity of electricity. Conduct electricity transactions. Like the storage battery characteristic correction unit 16A, the storage battery characteristic correction unit 16B stores the storage characteristic of the storage battery 3B, and uses the storage characteristic to correct the electric quantity stored in the storage battery 3B before the electric power information control unit 15B compares the electric power value information at a specific electric quantity. , and update the second power information to perform power trading.

As the first correction of the storage battery characteristics, the temperature characteristic correction unit 17A stores the storage capacity and temperature characteristics of the storage battery 3A, and uses this characteristic before the power information control unit 15A compares the power value information at a specific power level, according to the measured The temperature (measured temperature) at the time of power storage and the temperature at the time of power trading correct the power stored in the storage battery 3A, update the first power information, and perform power trading. Here, in the first electric power information, the temperature measured by the temperature detection unit 12A when the electric power stored in the battery 3A is measured is included in "battery temperature" in FIG. 8 as information related to the measured temperature of the battery 3A.

Similar to the temperature characteristic correcting unit 17A, the temperature characteristic correcting unit 17B stores the characteristic of the storage capacity and temperature of the storage battery 3B, and uses this characteristic before the electric power information control unit 15B compares the electric power value information at a specific electric quantity, based on the measured temperature and electric power. The temperature at the time of transaction is corrected for the electric power stored in the storage battery 3B, and the second electric power information is updated to carry out electric power trading. Here, in the second electric power information, the temperature measured by the temperature detection unit 12B when the electric quantity stored in the battery 3B is measured is included in "battery temperature" in FIG. 9 as information related to the measured temperature of the battery 3A.

Here, a correction formula based on temperature characteristics will be described. The corrected electric quantity of the storage quantity that changes with the temperature of the storage battery can be calculated by the formula (1).

Corrected electric quantity = electric quantity measured in the past x (temperature coefficient of temperature at the time of electric power transaction/temperature coefficient of temperature at the time of past measurement)...(1)

Regarding the temperature coefficient of the temperature at the time of electric power trading, for example, the storage amount at 25 degrees is set to "1", and this is the value of the storage amount at this temperature, for example, and differs depending on the storage battery. In addition, other calculation formulas or characteristic curve data may be referred to instead of formula (1).

As the second correction of battery characteristics, the self-discharge correction unit 18A stores the characteristics of the storage capacity of the storage battery 3A and the elapsed time, and uses this characteristic before the power information control unit 15A compares the power value information at a specific power level, according to the measured The time at the time of the stored power (measurement time) and the time at the time of power trading correct the power stored in the storage battery 3A, update the first power information, and perform power trading. Here, in the first electric power information, the measurement time measured by the timekeeping unit 13A when the power stored in the storage battery 3A is measured is included in the "event occurrence time" in FIG. Information.

Similar to the self-discharge correction unit 18A, the self-discharge correction unit 18B stores the characteristics of the storage amount of the storage battery 3B and the elapsed time, and uses this characteristic before the power information control unit 15B compares the power value information at a specific power level, based on the measured time and the elapsed time. At the time of power trading, the electric power stored in the storage battery 3B is corrected, and the second power information is updated to perform power trading. Here, in the second electric power information, the measurement time measured by the timer unit 13B when the electric quantity stored in the storage battery 3B is measured is included in the "event occurrence time" in FIG. Information.

Here, a correction formula based on the self-discharge characteristic will be described. Correction is performed since the stored power decreases with elapsed time after charging. The correction electric quantity at this time can be calculated|required from Formula (2).

Corrected electric quantity = electric quantity measured in the past × self-discharge coefficient of storage battery × (power trading time - time measured in the past)...(2)

Since the self-discharge coefficient of the storage battery differs depending on the storage battery, the coefficient is stored in the self-discharge correction units 18A and 18B in advance. In addition, the past measurement time is included in the first and second electric power information. In addition, other calculation formulas or characteristic curve data may be referred to instead of formula (2).

In addition, the charging and discharging times management unit 19A manages the charging and discharging times of the storage battery 3A, and determines the charging and discharging times of the storage battery 3A before the electric power information control unit 15A compares the power value information at a specific electric quantity, and judges that the storage battery 3A arrives when the number exceeds a predetermined number. For its lifetime, power transaction processing is prohibited.

FIG. 8 is a diagram showing an example of first power information stored in the first power information storage unit 14A of the first power trading device 51 . It is recorded in event A2 that the above-described temperature characteristic correction and self-discharge correction are performed before power trading. The number of times of charge and discharge counted by the charge and discharge number management unit 19A every time of charging or discharging is recorded in the "event content" of the event A1 at the time of charging.

Returning to FIG. 7, the charging and discharging times management unit 19B manages the charging and discharging times of the storage battery 3B, and before the electric power information control unit 15B compares the power value information under a specific electric quantity, judges the charging and discharging times of the storage battery 3B, and judges that the storage battery is more than a predetermined number of times. 3B reaches its lifetime, disabling power transaction processing.

FIG. 9 is a diagram showing an example of second power information stored in the second power information storage unit 14B of the second power trading device 55 . It is recorded in event B3 that the above-described temperature characteristic correction and self-discharge correction are performed before power trading. The number of times of charge and discharge counted by the charge and discharge number management unit 19B every time of charging or discharging is recorded in the "event content" of the events B1 and B2 at the time of charging.

Next, the operation of the power trading device according to the second embodiment of the present invention will be described with reference to the flowchart shown in FIG. 10 . In addition, in the description of each step, an element (for example, the electric power information control unit 15A) that executes the step is described together.

By connecting the first power trading device 51 and the second power trading device 55 , the communication units 22A and 22B of the first and second power trading devices 51 and 55 mutually authenticate each other. That is, authentication is performed by exchanging mutual authentication IDs at the time of initial connection (step 11).

After the first power trading device 51 and the second power trading device 55 are connected and authenticated, the power storage state grasping units 11A and 11B of the first and second power trading devices 51 and 55 measure the discharge speeds of the storage batteries 3A and 3B. , confirm that it is below the specified value (step 12). That is, since the power of the storage batteries 3A and 3B gradually decreases during discharge (during power use), the discharge speeds of the storage batteries 3A and 3B are measured so as not to perform power trading at that time.

After the power storage state grasping units 11A and 11B confirm that the discharge rates of the storage batteries 3A and 3B are below a predetermined value, the respective characteristic information of the storage batteries 3A and 3B are used to correct the electric quantities stored in the storage batteries 3A and 3B, and the first and second The corrected power quantities are stored in the two power information storage units 14A and 14B (step 13). In this case, correction based on temperature characteristics is performed by temperature characteristic correction units 17A and 17B, and correction based on self-discharge characteristics is performed by self-discharge correction units 18A and 18B. In addition, the confirmation of the charge and discharge count is performed by the charge and discharge count management units 19A and 19B.

When the electric power stored in the storage battery increases or decreases as a result of the correction as described above, processing is performed so that the increase or decrease is distributed in the same ratio as the ratio of the respective stored power amounts before correction.

After storing the correction results of the electric power stored in storage batteries 3A and 3B in the power information storage units 14A and 14B, the power information control unit 15A of the first power trading device 51 obtains the data from the second power information storage of the second power trading device 55 The unit 14B reads the second power information related to the storage battery 3B of the electric vehicle 100 on the side of the second power trading device 55 (step 14).

After reading the second power information related to the storage battery 3B of the electric vehicle 100 , the power information control unit 15A transfers the high-value power stored in the storage battery 3B on the second power trading device 55 side to the first power trading device 51 side. Compared with the amount of low-value electric power stored in storage battery 3A, the electric power transaction amount (here, in the electric power information allowing electric power transaction) is determined, and the traded electric power is set as "prohibited use". Here, if necessary, the first electric power information is divided in the same manner as the transaction electric amount, and stored in the electric power information storage unit 14A (step 15). Here, the trading volume of electric power takes the smaller amount of electric power when comparing high-value electric power and low-value electric power as the maximum value.

Then, the power information control units 15A and 15B respectively exchange power information of power traded by each of the first and second power trading devices 51 and 55 , and store the exchanged power information in each other's power information storage units 14A and 14B. (step 16). Next, the power information control units 15A and 15B respectively perform permission setting of power usage and power transaction to the newly stored power information (step 17).

Then, the power charges exchanged by the respective power information control units 15A and 15B are sent to the settlement system 6 from the settlement units 23A and 23B, and the settlement is performed (step 18). After the power fee settlement, the respective communication units 22A and 22B of the first and second power trading apparatuses 51 and 55 disconnect each other from the other (step 19).

As described above, the power trading device 51 according to the present embodiment includes the storage battery characteristic correction unit 16A including the temperature characteristic correction unit 17A for storing the storage capacity and temperature characteristics of the storage battery 3A, and the self-discharge correction unit 17A. 18A, which stores the storage amount and elapsed time characteristics of the storage battery 3A; and the charge and discharge count management unit 19A, which manages the charge and discharge count of the storage battery 3A. The electric power information control unit 15A corrects the electric power accumulated in the storage battery 3A by the temperature characteristic correction unit 17A and the self-discharge correction unit 18A before comparing the electric power value information at a specific electric quantity, and judges the charge and discharge of the storage battery 3A by the charge and discharge number management unit 19A When the number of times is equal to or greater than a predetermined number of times, it is determined that the storage battery 3A has reached the end of its life and the power trading process is prohibited. Therefore, power trading can be performed with high reliability.

In addition, since the power trading device 55 has the same function as the power trading device 51 , the same effects can of course be obtained.

Therefore, in the above steps 14 and 15, the power information control unit 15A of the first power trading device 51 reads the second power information related to the storage battery 3B from the power information storage unit 14B of the second power trading device 55 and determines the power trading On the contrary, the power transaction amount can also be determined by the power information control unit 15B of the second power trading device 55 reading the first power information related to the storage battery 3A from the power information storage unit 14A of the first power trading device 51 .

When a plurality of power trading devices are connected, which power trading device determines the power transaction amount is determined by comparing the electric power stored in storage batteries 3A and 3B in step 14 and determining the power trading device with a large amount of stored power, for example.

In addition, the power trading device 51 and the power trading device 55 can of course be constituted by dedicated circuits, but it is of course also possible to program the control method of the power trading device using a computer and execute the program on the computer.

In addition, in the second embodiment, the above-described temperature correction units 17A and 17B and self-discharge correction units 18A and 18B are not essential structures of the present invention. In addition, the charge and discharge count management units 19A and 19B are not essential structures, and in this case, the "charge and discharge count" is not recorded in the electric power information of FIG. 8 and FIG. 9 . In the case where the storage battery characteristic correcting units 16A and 16B are not provided, the temperature detecting units 12A and 13B and the time measuring units 13A and 13B are not essential.

(third embodiment)

Fig. 11 is a block diagram showing a schematic configuration of a power trading device according to a third embodiment of the present invention. In addition, in FIG. 11, the same code|symbol is attached|subjected to the part common to the said FIG. 1, and the description is abbreviate|omitted.

In FIG. 11 , the first power transaction device 61 includes a power storage state grasping unit 11A, a temperature detection unit 12A, a power information control unit 15A, and a communication unit 22A. The storage battery 3A is connected to the first power trading device 61 , and the storage battery 3A stores electric power generated by the power generation device 2 . Moreover, the storage battery 3A is connected to the electricity selling device 4 that actually sells electric power.

Like the first power trading device 61 , the second power trading device 65 includes a power storage state grasping unit 11B, a temperature detection unit 12B, a power information control unit 15B, and a communication unit 22B. The storage battery 3B is connected to the second power trading device 65 , and the storage battery 3B stores electric power generated by the photovoltaic power generation device 75 . In addition, the power generation device that charges the storage battery 3B is not limited to the solar power generation device 75 , and may be any power generation device that can obtain high-value electric power using natural energy, such as a wind power generation device.

The third power trading device 71 includes a timekeeping unit 13C, a power information storage unit 14C, a power information control unit 15C, a communication unit 22C, and a settlement unit 23C. The first power trading device 61 and the second power trading device 65 are connected to the third power trading device 71 through a communication line 80 .

Therefore, the difference from the first embodiment is that the first, second and third power trading devices 61, 65 and 71 are connected through the communication line 80, and the first power trading device 61 and the second power trading device can The portion shared by the devices 65 is included in the third power trading device 71 . In particular, since the electric power information of each storage battery is stored and managed in the electric power information storage unit 14C of the electric power trading device 71, it is difficult to rewrite the electric power information arbitrarily, and the reliability of the electric power information can be improved.

In addition, in the system configuration shown in FIG. 11 , as in the first power information storage unit 14A and the second power information storage unit 14B of FIG. 1 , each power trading device may have a power information storage unit instead of The power information storage unit 14C (first power information storage module and second power information storage module). In this case, the power information control unit 15C is equipped with a first power information obtaining module and a second power information obtaining module, and the power information related to the storage battery 3A is obtained from the first power information storage unit 14A by the first power information obtaining module. For the first power information, the second power information obtaining module obtains the power information related to the storage battery 3B, that is, the second power information, from the second power information storage unit 14B.

FIG. 12 is a schematic diagram showing an overview of power trading via an information communication network using the power trading device according to this embodiment. In FIG. 12, the first power trading device 61 shown in FIG. 11 is installed in a facility 140 equipped with a large-scale storage battery such as a region or a company, and the second power trading device 65 is installed in a facility 140 where a photovoltaic power generation device 75 and a storage battery 3B are introduced. In the house 109 and collective house 111. Furthermore, a third power trading device 71 is provided between the first power trading device 61 and the second power trading device 65 .

In Fig. 2, electricity generated from a photovoltaic power generation device, etc. is stored in an electric vehicle, and the electric vehicle is used to go to a commercial facility and conduct electricity trading while parked. In Fig. 12, electricity generated from sunlight is stored in a home battery. Electricity generated by devices etc. can be traded at any time with the storage battery of the other party connected to the information communication network.

In houses 109 and complex houses 111 where photovoltaic power generation devices 75 and storage batteries 3B are introduced and second power trading devices 65 are introduced, high-value electric power obtained by photovoltaic power generation is sold to The facility 140 of the first power trading device 61 buys cheap power obtained from the facility 140 via the third power trading device 71 . The buying and selling of this electric power is performed not by charging and discharging as described above, but by exchanging values and data.

In the third power trading device 71 , the power information storage unit 14C stores first power information including information stored in the storage battery 3A on the side of the first power trading device 61 and first identification information for identifying the storage battery 3A. The amount of electricity and information related to the value of the amount of electricity, that is, electricity value information. In addition, the second electricity information and the second identification information for identifying the storage battery 3B are stored. The second electricity information includes the second electricity trading device 65 The electric power stored in the storage battery 3B and the electric power value information of the electric power. That is, the first power information and the second power information are stored for each identification information in the power information storage unit 14C.

The power information control unit 15C is equipped with a first power information obtaining module and a second power information obtaining module based on the first power information stored in the power information storage unit 14C obtained by the first power information obtaining module and obtained by the second power information. The second power information obtained by the module is used for power trading between the storage battery 3A and the storage battery 3B. Specifically, the electric power value information for a specific electric power is compared between the electric power of the storage battery 3A and the electric power of the storage battery 3B. The information is exchanged and stored in the power information storage unit 14C.

Next, the operation of the power trading device according to this embodiment will be described with reference to the flowchart shown in FIG. 13 . In addition, in the description of each step, an element (for example, the electric power information control unit 15A) that executes the step is described together.

By connecting the first power trading device 61 and the third power trading device 71 via the communication line 80 , the communication unit 22A of the first power trading device 61 and the communication unit 22C of the third power trading device 71 mutually authenticate. Furthermore, the second power trading device 65 is connected to the third power trading device 71 via the communication line 80, so that the communication unit 22B of the second power trading device 65 and the communication unit 22C of the third power trading device 71 mutually authenticate (step 21 ).

That is, when the first power trading device 61 and the third power trading device 71 are initially connected and when the second power trading device 65 and the third power trading device 71 are initially connected, mutual authentication IDs are exchanged for authentication, Thus, the power information control unit 15C obtains permission to operate the power information stored in the power information storage unit 14C by the first power trading device 61 and the power information stored by the second power trading device 65 , Thus enabling electricity trading.

After the first power trading device 61 and the second power trading device 65 are respectively connected to the third power trading device 71 and authenticated, the power storage state grasping units 11A and 11B of the first and second power trading devices 61 and 65 measure It is confirmed that the discharge rates of the storage batteries 3A and 3B are equal to or less than a predetermined value (step 22). That is, since the electric power of each of storage batteries 3A and 3B gradually decreases during discharge (during power usage), the discharge speeds of storage batteries 3A and 3B are measured so as not to perform power trading at that time.

After measuring the discharge rates of storage batteries 3A and 3B and confirming that they are below the specified value, the power information control unit 15C of the third power trading device 71 sends request signals to the first and second power trading devices 61 and 65 respectively, requesting The electrical quantities of storage batteries 3A and 3B are measured again. By sending this request signal, the first and second power trading apparatuses 61 and 65 measure the electric quantities of storage batteries 3A and 3B again and send the results. When the electric power information control unit 15C receives the measured electric quantities of the batteries 3A and 3B, it stores the received electric quantities of the batteries 3A and 3B in the electric power information storage unit 14C (step 23 ). For example, the first power information is shown in FIG. 4 , and the second power information is shown in FIG. 5 .

After the electric power information control unit 15C stores the electric quantities of the storage batteries 3A and 3B in the electric power information storage unit 14C, the first electric power information obtaining module and the second electric power information obtaining module obtain and read the stored electric power information (step 24) , and compare the amount of high-value power stored in the storage battery 3B on the side of the second power trading device 65 with the amount of low-value power stored in the storage battery 3A on the side of the first power trading device 61 to determine the amount of power transaction (here, in In the power information that allows power trading), set the traded power to "prohibited use". Here, if necessary, the power information is divided in the same manner as the transaction amount of electricity, and stored in the power information storage unit 14C (step 25). Here, the trading volume of electric power takes the smaller amount of electric power when comparing high-value electric power and low-value electric power as the maximum value.

Then, the power information control unit 15C exchanges the power information of the power traded between the power information control unit 15A of the first power trading device 61 and the power information control unit 15B of each second power trading device 65 , and transfers the exchanged The power information is stored as power information of the first power trading device 61 and power information of the second power trading device 65 in the power information storage unit 14C, respectively (step 26 ). Then, the power information control unit 15C performs permission setting of power usage and power trading with respect to the newly stored power information (step 27 ).

After the power information control unit 15C sets permission settings for power usage and power trading for the newly stored power information, the settlement unit 23C of the third power trading device 71 sends the first and second power trading devices 61 and 65 exchanged electricity charges for settlement (step 28). After the settlement of electricity trading is completed, the corresponding communication units 22A, 22B, and 22C of the first to third electricity trading apparatuses 61, 65, and 71 are disconnected (step 29). If the connection is disconnected, the power information control unit 15C loses permission to operate the power information stored in the first power trading device 61 and the power information stored in the second power trading device 65 stored in the power information storage unit 14C, Power information cannot be edited afterwards.

In this way, according to the power transaction device 71 of this embodiment, the information (the first power information, the first identification information, the second power information, and the second Information), and based on the information stored in the power information storage unit 14C related to the storage batteries 3A and 3B, the exchange of power value information is performed, so the first power trading device 61 and the second power trading device 65 do not need to have a power information storage unit , so that the size and weight of the two power trading devices 61 and 65 can be reduced, respectively, and cost reduction can be realized. In addition, by applying such that the information stored in the power information storage unit 14C cannot be edited except at the time of power transaction, and that the information stored in the power information storage unit 14C cannot be edited except for a person authenticated by the authentication ID, it is possible to prevent the Power information can be edited at will to improve the reliability of power transactions.

In addition, each of the power trading devices 61, 65, and 71 may be constituted by a dedicated circuit, of course, but it is of course also possible to program the control method of the power trading device using a computer and execute the program on the computer.

In addition, in the third embodiment, the above-mentioned temperature detection units 12A and 12B are not essential structures of the present invention. In this case, "battery temperature" is not recorded in the electric power information. In addition, in the third embodiment, the above-mentioned timer unit 13C is not an essential configuration. In this case, "event occurrence time" is not recorded in the electric power information.

(fourth embodiment)

Fig. 14 is a block diagram showing a schematic configuration of a power trading device according to a fourth embodiment of the present invention. In addition, in FIG. 14, the same code|symbol is attached|subjected to the part common to FIG. 1 and FIG. 11 mentioned above, and description is abbreviate|omitted.

In FIG. 14 , the storage battery 3A is connected to the first power trading device 61 , and the storage battery 3A stores electric power generated by the power generation device 2 . Moreover, the storage battery 3A is connected to the electricity selling device 4 that actually sells electric power.

The third power trading device 81 has a configuration in which a storage battery characteristic correction unit 16C identical to the storage battery characteristic correction unit 16A ( 16B) of the second embodiment is added to the third power trading device 71 of the third embodiment described above. Since the third power trading device 81 includes the storage battery characteristic correction unit 16C, it does not need to be separately provided by the first and second power trading devices as in the second embodiment.

The storage battery characteristic correcting unit 16C has a temperature characteristic correcting unit 17C, a self-discharge correcting unit 18C, and a charge and discharge count management unit 19C. The storage battery characteristic correcting unit 16C stores the respective storage characteristics of the storage batteries 3A and 3B, corrects the quantity of electricity accumulated in the storage battery 3A using the storage characteristic of the storage battery 3A and updates the first one before the power information control unit 15C compares the power value information at a specific quantity of electricity. In addition, the second electric power information is updated by correcting the electric power stored in the storage battery 3B using the storage characteristics of the storage battery 3B.

The temperature characteristic correcting unit 17C stores the characteristics of the storage capacity and temperature of the storage batteries 3A and 3B, and uses the above-mentioned characteristics of the storage battery 3A before the power information control unit 15C compares the power value information at a specific power level, according to the measured temperature and the time of power transaction. The temperature of the battery 3A is used to correct the amount of power stored in the battery 3A and update the first power information, and using the above characteristics of the battery 3B, the power stored in the battery 3B is corrected and the second power information is updated.

Here, the first electric power information includes the temperature measured by the temperature detection means 12A when measuring the electric power stored in the storage battery 3A as information related to the measured temperature of the storage battery 3A. In addition, the second electric power information includes, as information related to the measured temperature of the battery 3B, the temperature measured by the temperature detection unit 12B when measuring the electric power stored in the battery 3B. For example, the first power information is shown in FIG. 8 , and the second power information is shown in FIG. 9 .

The temperature characteristic correction performed by the temperature characteristic correcting unit 17C can unify electric power information to a predetermined temperature (for example, 25 degrees) and perform electric power trading. In the method of updating the electric quantity of the storage battery by re-measurement as in the third embodiment, the temperature of the storage battery varies depending on the environment in which the storage battery is installed. For example, if the storage battery is installed in each household as shown in FIG. 12, it is difficult to keep the temperature of the storage battery constant.

The self-discharge correcting unit 18C stores the characteristics of the storage capacity and the elapsed time of each of the storage batteries 3A and 3B, and uses the above-mentioned characteristics of the storage battery 3A to perform a power transaction based on the measurement time and power transaction before the power information control unit 15C compares the power value information at a specific power level. Correct the electric power stored in the storage battery 3A at the time of the hour, and update the first electric power information, and use the above-mentioned characteristics of the storage battery 3B to correct the electric power stored in the storage battery 3B according to the measurement time and the time of power transaction, and update the second electric power information. information.

Here, the first electric power information includes, as information related to the measurement time of the battery 3A, the measurement time measured by the timekeeping unit 13C when measuring the electric power stored in the battery 3A. In addition, the second electric power information includes, as information related to the measurement time of the battery 3B, the measurement time measured by the timer unit 13C when measuring the electric power stored in the battery 3B.

The charge and discharge count management unit 19C manages the charge and discharge counts of the storage batteries 3A and 3B, and determines the charge and discharge count of the storage battery 3A before the electric power information control unit 15C compares the power value information at a specific electric quantity, and judges that the storage battery 3A has arrived when the count exceeds a predetermined count. For its lifetime, power transaction processing is prohibited. In addition, the number of times of charge and discharge of the storage battery 3B is determined, and when the number of charge and discharge of the storage battery 3B is equal to or greater than a predetermined number, it is determined that the storage battery 3B has reached the end of its life, and the power trading process is prohibited.

Next, the operation of the power trading device according to this embodiment will be described with reference to the flowchart shown in FIG. 15 . In addition, in the description of each step, an element (for example, the electric power information control unit 15A) that executes the step is described together.

By connecting the first power trading device 61 and the third power trading device 81 via the communication line 80 , the communication unit 22A of the first power trading device 61 and the communication unit 22C of the third power trading device 81 mutually authenticate. In addition, the second power trading device 65 is connected to the third power trading device 81 via the communication line 80, so that the communication unit 22B of the second power trading device 65 and the communication unit 22C of the third power trading device 81 mutually authenticate (step 31 ). That is, when the first power trading device 61 and the third power trading device 81 are initially connected and when the second power trading device 65 and the third power trading device 81 are initially connected, mutual authentication IDs are exchanged for authentication, The power information control unit 15C thereby obtains permission to operate on the power information stored in the power information storage unit 14C by the first power trading device 61 and the power information stored by the second power trading device 65 , thereby being able to Conduct electricity transactions.

After the first power trading device 61 and the second power trading device 65 are respectively connected to the third power trading device 81 and authenticated, the power storage state grasping units 11A and 11B of the first and second power trading devices 61 and 65 measure It is confirmed that the discharge rates of the storage batteries 3A and 3B are equal to or less than a predetermined value (step 32). That is, since the electric power of the storage batteries 3A and 3B gradually decreases during discharge (during power usage), the discharge speeds of the storage batteries 3A and 3B are measured so as not to perform power trading at that time.

After the power storage state grasping units 11A and 11B of the first and second power trading devices 61 and 65 measure the discharge rates of the storage batteries 3A and 3B and confirm that they are respectively equal to or less than a predetermined value, the power information control unit of the third power trading device 81 15C reads the power information stored in each storage battery 3A and 3B from the power information storage unit 14C (step 33). Further, the power information control unit 15C corrects the electric power accumulated in the respective storage batteries 3A and 3B of the first and second power trading apparatuses 61 and 65 using the characteristic information of the storage batteries 3A and 3B, and stores the corrected power information storage unit 14C in the power information storage unit 14C. The electric quantity (step 34). In this case, correction based on the temperature characteristic is performed by the temperature characteristic correction unit 17C, and correction based on the self-discharge characteristic is performed by the self-discharge correction unit 18C. In addition, the confirmation of the number of times of charging and discharging is performed by the number of times of charging and discharging management unit 19C.

Next, the power information control unit 15C compares the amount of high-value power stored in the storage battery 3B on the side of the second power trading device 65 with the amount of low-value power stored in the storage battery 3A on the side of the first power trading device 61, and determines the amount of power. transaction volume, and set the transaction power to "prohibited use". Here, if necessary, the power information is divided and stored in the power information storage unit 14C in the same manner as the transaction amount (step 35). Here, the trading volume of electric power is the maximum amount of electric power that is less when comparing high-value electric power and low-value electric power.

Then, the power information control unit 15C exchanges the power information of the power traded between the power information control unit 15A of the first power trading device 61 and the power information control unit 15B of each second power trading device 65 , and transfers the exchanged The power information is stored as power information of the first power trading device 61 and power information of the second power trading device 65 in the power information storage unit 14C, respectively (step 36 ). Next, the electric power information control unit 15C performs permission setting of electric power usage and electric power transaction to the newly stored electric power information (step 37 ).

After the power information control unit 15C sets permission settings for power usage and power trading for the newly stored power information, the settlement unit 23C of the third power trading device 81 transmits to the settlement system 6 the information in the first and second power trading devices 61 and 65 exchanged electricity charges for settlement (step 38). After the settlement of the electricity trading is completed, the communication units 22A, 22B, and 22C of the first to third electricity trading apparatuses 61, 65, and 81 are disconnected (step 39). The power information control unit 15C loses permission to operate the power information stored in the power information storage unit 14C by the first power trading device 61 and the power information stored by the second power trading device 65 , and cannot edit thereafter. power information.

Thus, according to the power trading device 81 of the present embodiment, the storage battery characteristic correction unit 16C is provided with the temperature characteristic correction unit 17C which stores the storage capacity and temperature characteristics of the storage batteries 3A and 3B, and self-discharge correction unit 17C. A unit 18C stores the characteristics of the respective storage amounts and elapsed time of the storage batteries 3A and 3B; and a charge and discharge count management unit 19C manages the charge and discharge counts of the respective storage batteries 3A and 3B. In addition, the electric power information control unit 15C corrects the respective stored electric quantities of the storage batteries 3A and 3B by the temperature characteristic correcting unit 17C and the self-discharge correcting unit 18C before comparing the electric power value information at a specific electric quantity, and determines that the storage batteries are When the number of times of charging and discharging each of 3A and 3B is equal to or greater than a predetermined number, it is determined that storage batteries 3A and 3B have reached the end of their life, and the power trading process is prohibited, so that power trading can be performed with high reliability.

In addition, since it has the same structure as the power trading apparatus 71 of the said 3rd Embodiment except the storage battery characteristic correcting means 16C, it cannot be overemphasized that the same effect can be achieved.

In addition, each of the power trading devices 61, 65, and 81 may of course be constituted by a dedicated circuit, but of course it is also possible to program the control method of the power trading device using a computer and execute the program on the computer.

In addition, in the fourth embodiment, the above-described temperature correction means 17C and self-discharge correction means 18C are not essential structures in the present invention. In addition, 19 C of charge-discharge count management means are not an essential structure, and in this case, "the charge-discharge count" is not recorded in electric power information. When the storage battery characteristic correction unit 16C is not provided, the temperature detection units 12A and 12B and the timer unit 13C are not essential.

In addition, in the first to fourth embodiments, it is not essential to the present invention that the discharge rate of the storage battery is measured by the power storage state grasping means, and that power trading is not performed when the discharge rate is high. It is also possible to detect when the storage battery is being charged or discharged by the power storage state grasping unit so that power trading is not performed during charging or discharging (when the storage amount is changing).

Alternatively, instead of judging by the discharge rate, power trading may not be performed when the power storage state grasping unit detects that the electric power stored in the storage battery is below a predetermined value (for example, 1 kWh), or the storage battery may be set to There is more than a certain amount (for example, 1kWh) for electricity trading, and the entire stored electricity is not traded at one time.

In addition, in the present embodiment, electric power has been described, but it is not limited to this, and energy other than electric power may be used. For example, transactions of oil, gas, heat, etc. with different values can be processed.

That is to say, an energy trading device is realized, which includes: a first energy information storage module, which stores first energy information, the first energy information includes the energy amount and energy value information stored in the first energy storage device, and the energy value The information is information related to the value of the amount of energy; the communication module obtains the second energy information from other energy trading devices, and the other energy trading devices store the second energy information, and the second energy information includes the second storage The amount of energy stored in the energy device and the energy value information of the amount of energy; and an energy information control module, based on the first energy information and the second energy information, in the first energy storage device and the second energy storage device Energy transactions are performed between two energy storage devices; the energy information control module compares the amount of specific energy between the amount of energy of the first energy storage device and the amount of energy of the second energy storage device energy value information, when two energy storage devices have different energy value information for the specific amount of energy, exchange and store the energy value information in the first energy information storage module and the Among other energy trading devices.

In addition, an energy trading device is realized, which includes: an energy information storage module, which stores first energy information and first identification information as well as second energy information and identification information, the first energy information includes the energy stored in the first energy storage device energy amount and energy value information, the energy value information is related to the value of the energy amount, the first identification information is used to identify the first energy storage device, and the second energy information includes a second energy storage device the amount of energy stored in the device and energy value information of the amount of energy, the identification information is used to identify the second energy storage device; and an energy information control module based on the first energy information and the second energy storage device Two energy information is used to conduct energy transactions between the first energy storage device and the second energy storage device; the energy information control module compares the energy amount of the first energy storage device Comparing the energy value information for a specific energy amount between the energy amounts of the devices, and comparing the energy value information when two energy storage devices have different energy value information for the specific energy amount exchanged and stored in the energy information storage module.

Although this invention was demonstrated in detail with reference to the specific embodiment, it is clear for those skilled in the art that various changes and modifications can be added without departing from the mind and range of this invention.

This application is based on the JP Patent application (Japanese Patent Application No. 2010-029410) for which it applied on February 12, 2010, The content is taken in here.

Industrial Applicability

The present invention has the effect of enabling electricity transactions with high reliability between people who have high-value electricity and want to sell it, and people who have low-value electricity and want to get high-value electricity, and can be applied to electric vehicles, solar power generation, or wind power Electric power equipment that obtains power from natural energy such as power generation, and power equipment in regions or companies that have large-scale energy storage.

reference sign

1, 51, 61 The first power trading device

2 power generation device

3A, 3B battery

4 electricity vending device

5, 55, 65 Second power trading device

6 settlement system

11A, 11B battery status control unit

12A, 12B temperature detection unit

13A, 13B, 13C timing unit

14A The first power information storage unit

14B Second power information storage unit

14C Power information storage unit

15A, 15B, 15C power information control unit

16A, 16B, 16C battery characteristic correction unit

17A, 17B, 17C temperature characteristic correction unit

18A, 18B, 18C self-discharge correction unit

19A, 19B, 19C charge and discharge times management unit

22A, 22B, 22C communication unit

23A, 23B, 23C settlement unit

71, 81 The third power trading device

75 solar power generation device

80 communication lines

100 electric vehicles

Claims (10)

1. electricity transaction device possesses:

First power information obtains module; Obtain stored information from the first power information memory module that stores first power information; Said first power information comprises electric weight and the electric power value information of accumulating in first storage battery, and this electric power value information is the information relevant with the value of said electric weight;

Second power information obtains module, obtains stored information from the second power information memory module that stores second power information, and said second power information comprises the electric weight accumulated in second storage battery and the electric power value information of this electric weight; And

The power information control module is carried out electricity transaction based on said first power information and said second power information between said first storage battery and said second storage battery,

Said power information control module; Between the electric weight of the electric weight of said first storage battery and said second storage battery; To the more said electric power value information of particular charge; When two storage batterys exist the different power information of said particular charge electric power value information, with said electric power value information exchange and be stored in said first power information memory module and the said second power information memory module.

2. electricity transaction device according to claim 1,

Said electric power value information comprises the electricity-generating method or the power price of the electric weight of accumulating in the said storage battery.

3. electricity transaction device according to claim 1 and 2,

Said power information control module is divided into a plurality of power informations with said first power information, so as between the electric weight of the electric weight of said first storage battery and said second storage battery to the more said electric power value information of particular charge.

4. according to each the described electricity transaction device in the claim 1 to 3,

Possess electric power storage state recognizing module, hold the electric power storage state of said first storage battery,

When the velocity of discharge of utilizing said electric power storage state recognizing module to learn said first storage battery is setting when following, the said electric power value information under the more said particular charge of said power information control module.

5. electricity transaction device according to claim 4,

Said power information control module is before the said electric power value information under the more said particular charge; The electric weight that utilizes said electric power storage state recognizing module to accumulate in said first storage battery of instrumentation once more upgrades said first power information and be stored in the said first power information memory module.

6. according to each the described electricity transaction device in the claim 1 to 5,

Possess the battery characteristics correction module, this battery characteristics correction module stores the electric power storage characteristic of said first storage battery,

Said power information control module is before the said electric power value information under the more said particular charge; Utilize said battery characteristics correction module to proofread and correct the electric weight of accumulating in said first storage battery, and upgrade said first power information and carry out said electricity transaction.

7. electricity transaction device according to claim 6,

Said first power information comprise with said first storage battery of instrumentation in accumulate electric weight the time said first storage battery the information of instrumentation temperature correlation,

Said battery characteristics correction module possesses the temperature characterisitic correction module, and this temperature characterisitic correction module stores the charge capacity of said first storage battery and the characteristic of temperature,

Said power information control module is before the said electric power value information under the more said particular charge; Utilize said temperature characterisitic correction module and the temperature during according to said instrumentation temperature and said electricity transaction is proofreaied and correct the electric weight of accumulating in said first storage battery, and upgrade said first power information and carry out said electricity transaction.

8. according to claim 6 or 7 described electricity transaction devices,

Said first power information comprise with said first storage battery of instrumentation in accumulate electric weight the time the information of instrumentation time correlation,

Said battery characteristics correction module possesses self-discharge characteristic correction module, and this self-discharge characteristic correction module stores has the charge capacity of said first storage battery and the characteristic in elapsed time,

Said power information control module is before the said electric power value information under the more said particular charge; Utilize said self-discharge characteristic correction module and the time during according to said instrumentation time and said electricity transaction is proofreaied and correct the electric weight of accumulating in said first storage battery, and upgrade said first power information and carry out said electricity transaction.

9. the control method of an electricity transaction device possesses following steps:

First power information obtains step; Obtain stored information from the first power information memory module that stores first power information; Said first power information comprises electric weight and the electric power value information of accumulating in first storage battery, and this electric power value information is the information relevant with the value of said electric weight;

Second power information obtains step, obtains stored information from the second power information memory module that stores second power information, and said second power information comprises the electric weight accumulated in second storage battery and the electric power value information of this electric weight; And

The electricity transaction step is carried out electricity transaction based on said first power information and said second power information between said first storage battery and said second storage battery,

In the said electricity transaction step; Between the electric weight of the electric weight of said first storage battery and said second storage battery; To the more said electric power value information of particular charge; When two storage batterys exist the different power information of said particular charge electric power value information, with said electric power value information exchange and be stored in said first power information memory module and the said second power information memory module.

10. program that makes computer carry out the control method of electricity transaction device as claimed in claim 9.

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